Direction: Read the following information and answer the question that follow.
In a study of five brands of pain relieving tablets P, Q, R, S and T, the brands were tested and ranked against each other as more or less effective per dose. The following results were obtained.
I. P was more effective than Q.
II. The effectiveness of R was less than that of S.
III. T was the least effective brand tested.
IV. Q and R were equally effective.
V. The effectiveness of S was greater than that of Q.
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If the above statements are true, which of the following must also be true?
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- P and S were equally effective.
- P was the most effective.
- S was the most effective.
- R was less effective than P.
Correct Option: D
According to the question,
P was more effective than Q.
1. P > Q.
The effectiveness of R was less than that of S.
2. S > R.
T was the least effective brand tested.
3. T is least effective.
Q and R were equally effective.
4. Q = R.
The effectiveness of S was greater than that of Q.
5. S > Q.
from 1 and 5 ,
6. S/P > Q .
from 6 and 4 ,
7. S/P > Q = R .
from 7 and 3 ,
∴ S/P > Q = R > T
R was less effective than p.
